Which of the following best defines behavior?

The best definition of behavior is that it encompasses responses influenced by genetics and the environment. This perspective acknowledges that behavior is not purely instinctual or predetermined but is shaped by a variety of factors. Genetics play a crucial role in establishing predispositions and capabilities that can influence how an organism behaves. However, the environment also has a significant impact, as it can modify or trigger certain behaviors through experiences, learning, and social interactions.

This comprehensive view allows for understanding behavior as a dynamic interplay between an organism's biological makeup and the external stimuli it encounters throughout its life. This definition also aligns well with the principles of behavioral science, which explore how behavior develops and adapts in different contexts. Other definitions may touch upon aspects of behavior but do not capture the full complexity of how both internal and external factors contribute to behavioral outcomes.